In 1970s San Francisco, a precocious 15-year-old (Bel Powley) embarks on an enthusiastic sexual odyssey, beginning with her mother's current lover (Alexander Skarsgård).

In 1970s San Francisco, a precocious 15-year-old (Bel Powley) embarks on an enthusiastic sexual odyssey, beginning with her mother's current lover (Alexander Skarsgård).